<!DOCTYPE html>
<html class='reftest-wait'>
  <!-- Test: if select is required and has a selected option and the selection
             did changed, :-moz-ui-valid should apply. -->
  <link rel='stylesheet' type='text/css' href='style.css'>
  <body onload="document.getElementById('s').selectedIndex = 0;
                document.documentElement.className = '';">
    <select id='s' class='valid' required>
      <option>foo</option>
    </select>
  </body>
</html>
